Until they are ready to accept the message, the message will fall on deaf ears. You know, the old you can lead a horse to water routine.
Too much salt and too much light can be corrosive and blinding.
True that unless the Holy Spirit draws a man (John 6:44) they will not hear. However, its also true that we are not only to preach the Gospel to those who are ready to hear...but those who aren't. You have no idea if they will be listening or not. An honest conversation is what I am suggesting. They can choose to hear or not...Just like Agrippa or the Pharisees. Their unbelief didn't stop Jesus...it didn't stop Paul...and it shouldn't stop us.
Romans 10: 14, 15